I have been getting this error since I did the upgrade to WHM 11.44.0 (build 22) on Thursday. I chose one account to share the hourly logs that I am getting the problem on (see attachment). This error affects several accounts (not all as far as I can see) but it is doing this on both servers. I re-ran the update using upcp -force option without success.

Well, at least I know I am not alone in this! It did start right after the WHM upgrade, so I would guess it was something in the upgrade.
I am running Centos 6.4, but the error did not start until the WHM upgrade.
Hopefully someone will have an answer...

If you're having an issue with a recent cPanel update, you should do us all a favor and open a ticket about it:http://go.cpanel.net/bugs

If one user has an issue and posts about it on the forums, it could be specific to that one server. If multiple users open a ticket to cPanel Technical Support, those tickets can be flagged and counted and issues found and fixed, quicker.

Downgrading to fix an update issue should not be suggested, IMO.

cPanel Technical Support is always available.

Stop hovering to collapse...Click to collapse...Hover to expand...Click to expand...

Same for me. Exactly the same.
Relevant part of /usr/local/cpanel/logs/error_log:

[2014-07-15 15:13:51 +0200] warn [cpanellogd] RRDs Error: /var/cpanel/bandwidth/account-all-peak.rrd: Can't call method "quote" on an undefined value at /usr/local/cpanel/Cpanel/Logd.pm line 1360.
at /usr/local/cpanel/Cpanel/Bandwidth/RRD.pm line 120
Cpanel::Bandwidth::RRD::_rrdtool('last', '/var/cpanel/bandwidth/account-all-peak.rrd') called at /usr/local/cpanel/Cpanel/Bandwidth/RRD.pm line 111
Cpanel::Bandwidth::RRD::_call_rrdtool(Cpanel::Bandwidth::RRD=HASH(0x27f6ab0), 'last', '/var/cpanel/bandwidth/account-all-peak.rrd') called at /usr/local/cpanel/Cpanel/Bandwidth/RRD.pm line 528
Cpanel::Bandwidth::RRD::last(Cpanel::Bandwidth::RRD=HASH(0x27f6ab0), HASH(0x2869240)) called at /usr/local/cpanel/Cpanel/Logd.pm line 1325
Cpanel::Logd::updaterrdb('account', 'all', HASH(0x27a64f8), 1405430031, Cpanel::Logd::BigLock=HASH(0x1a95538)) called at /usr/local/cpanel/Cpanel/Logd.pm line 904
Cpanel::Logd::updatebw('account', '/home/account', 2894, 'example.com', 'unlimited', ARRAY(0x2085c40), Cpanel::Logd::BigLock=HASH(0x1a95538), 1405422999) called at /usr/local/cpanel/Cpanel/Logd.pm line 446
Cpanel::Logd::scanbandwidth('', undef) called at /usr/local/cpanel/libexec/cpanellogd line 184
[2014-07-15 15:13:51 +0200] warn [cpanellogd] RRDs Error: /var/cpanel/bandwidth/account-all-peak.rrd 3600:0 1405422000:0 1405425600:3088164: /var/cpanel/bandwidth/account-all-peak.rrd: illegal attempt to update using time 3600 when last update time is 1405303200 (minimum one second step) at /usr/local/cpanel/Cpanel/Bandwidth/RRD.pm line 125
Cpanel::Bandwidth::RRD::_rrdtool('update', '/var/cpanel/bandwidth/account-all-peak.rrd', '3600:0', '1405422000:0', '1405425600:3088164') called at /usr/local/cpanel/Cpanel/Bandwidth/RRD.pm line 111
Cpanel::Bandwidth::RRD::_call_rrdtool(Cpanel::Bandwidth::RRD=HASH(0x27f6ab0), 'update', '/var/cpanel/bandwidth/account-all-peak.rrd', '3600:0', '1405422000:0', '1405425600:3088164') called at /usr/local/cpanel/Cpanel/Bandwidth/RRD.pm line 196
Cpanel::Bandwidth::RRD::update(Cpanel::Bandwidth::RRD=HASH(0x27f6ab0), HASH(0x28693c0)) called at /usr/local/cpanel/Cpanel/Logd.pm line 1340
eval {...} called at /usr/local/cpanel/Cpanel/Logd.pm line 1337
Cpanel::Logd::updaterrdb('account', 'all', HASH(0x27a64f8), 1405430031, Cpanel::Logd::BigLock=HASH(0x1a95538)) called at /usr/local/cpanel/Cpanel/Logd.pm line 904
Cpanel::Logd::updatebw('account', '/home/account', 2894, 'example.com', 'unlimited', ARRAY(0x2085c40), Cpanel::Logd::BigLock=HASH(0x1a95538), 1405422999) called at /usr/local/cpanel/Cpanel/Logd.pm line 446
Cpanel::Logd::scanbandwidth('', undef) called at /usr/local/cpanel/libexec/cpanellogd line 184

Click to expand...

This has happened soon after having updgraded WHM from 11.42.x into 11.44.x.
Going to check whether or not accounts' quotas are correctly reported by WHM/cPanel.Investigations from cPanel side should take place ASAP (no upcp progress so far).

Going to check whether or not accounts' quotas are correctly reported by WHM/cPanel.

Click to expand...

The "disk used" reported in WHM is correct.
So quota is not involved at all. And it seem to me that bandwidth measures are not as well.
Someone else having tracked errors in such errors in /usr/local/cpanel/logs/error_log?
Consequences of such? Thanks.

Hello,
Thanks for contacting us today. We have identified and addressed this issue with our internal case 106993. The fix for this issue is currently under review and going through our Quality Assurance process.
Once the fix has been released to the public, we will publish this case number to our change log at http://go.cpanel.net/changelog
Unfortunately, there isn't anything we can do about the error notifications. However, these errors are not critical to the operation of the system and will self-correct once that fix has been released.
Please let me know if you have any further questions and I'll be happy to provide any assistance that I can.
--
Respectfully,
Phil Stark
cPanel, Inc.